Siemens aeroelastically tailored blade Innovative blade increases energy production The new aeroelastically tailored blade from Siemens increases energy production without increasing loads on the wind turbine. The energy output of a wind turbine is dependent on the rotor size. With larger rotor sizes, higher production can be obtained. However, a bigger rotor traditionally increases the loads on the wind turbine, which calls for larger and heavier structural components. Siemens new aeroelastically tailored blade changes that. The newly developed blade design couples controlled torsional twisting of the blade with aerodynamic loading. The secret behind the aeroelastically tailored blade is to be found in the intelligent design work, which added a bend-twist-coupling within the blade, resulting in the blade reducing the loads on the turbine. The new blade will instantly adjust the blade’s angle of attack created by wind gusts. This minimizes the stress on the turbine, whereas the pitch and turbine control system handles the slower variations in the wind speed for optimal operation. These properties represent major advances in blade performance and design. This ultimately provides improved performance at low wind speeds due to the larger rotor, and optimal load characteristics at all wind speeds. Answers for energy.

Traditional blade Aeroelastically tailored blade Traditional blades The blade twist is “fixed” at all wind speeds and loading, and regulation is entirely handled by the pitch system. Aeroelastically tailored blades Here, the blade twist is dependent on wind speed and loading, and the blade can adjust to wind gusts and turbulence, without the pitch system being activated. The Siemens 53 m blade is the first blade from Siemens featuring aeroelastic capabilities. The Siemens IntegralBlade® technology facilitates this leap forward in blade architecture through its robust and flexible design. Since...